JPH0530533U - Propeller yaft - Google Patents

Abstract

(57) [Summary] [Objective] The adhesive layer of the adhesive is formed thin to enhance the adhesive force between the tube and the yoke, and the adhesive before curing is prevented from leaking to the outside. [Structure] On the outer peripheral surface of a shaft portion 2A of a yoke 2 which is fitted with an end portion 1A of a tube 1, peripheral portions 3A and 3B of an adhesive layer 3 are provided.
Groove 4 that can be opposed to and can hold the adhesive before curing
A and 4B are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a propeller shaft, and more particularly to a propeller shaft suitable for use in transmitting power from a vehicle engine to a vehicle wheel or the like.

[0002]

[Prior Art]

 Conventionally, as this type of propeller shaft, for example, there is one disclosed in Japanese Utility Model Laid-Open No. 62-50316.

In such a propeller shaft, a wide groove (recess) is provided on at least one of the fitting surfaces of the yoke and the tube for stable supply and curing of the adhesive, and the groove is provided on the tube. The yoke is adhered to the tube by drawing and holding the adhesive from the drawing hole.

[0004]

[Problems to be solved by the device]

 By the way, the thinner the adhesive layer of the adhesive has, the stronger the interfacial adhesive force becomes, so that the adhesive layer itself is less likely to be broken.

However, in the conventional propeller shaft as described above, since the adhesive is formed by holding the adhesive in the groove, the adhesive layer becomes thick and the adhesive function of the adhesive is sufficient. There was a problem that it could not be exhibited.

An object of the present invention is to form a thin adhesive layer of an adhesive to increase the adhesive strength between a tube and a yoke and prevent the adhesive before curing from leaking to the outside. It is to provide a propeller shaft capable of

[0007]

[Means for Solving the Problems]

 The propeller shaft of the present invention is a propeller shaft in which an end portion of a tube is fitted to an outer periphery of a shaft portion of a yoke via an adhesive layer of an adhesive, and at least one of a bonding surface of the yoke and the tube is It is characterized in that a concave portion is provided facing the peripheral portion of the adhesive layer and capable of retaining the adhesive.

[0008]

[Action]

 In the propeller shaft of the present invention, at least one of the fitting surfaces of the yoke and the tube is provided with a recess facing the peripheral edge of the adhesive layer of the adhesive and capable of retaining the adhesive. At the time of assembling with, the adhesive is spread thinly on the fitting surface, and the area of the spread is limited by the recess.

With these, the adhesive layer is thinly formed to enhance the adhesive force between the tube and the yoke, and the adhesive before curing is prevented from leaking to the outside.

Further, by providing an air vent hole penetrating inward and outward in the portion of the yoke or tube facing the recess, it is possible to avoid an increase in air pressure in the tube during the assembly of the yoke and the tube. It is also possible to improve their assembly workability.

[0011]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram for explaining a first embodiment of the present invention. In FIG. 1, reference numeral 1 is a tube, 2 is a yoke, and the end portion 1A of the tube 1 is fitted to the outer periphery of a shaft portion 2A of the yoke 2 via an adhesive layer 3 of an adhesive. The shaft portion 2A of the yoke 2 is formed in a cylindrical sleeve shape having an outer diameter corresponding to the inner diameter of the end portion 1A of the tube 1.

The materials of the tube 1 and the yoke 2 are arbitrary, and when they are different materials, for example, a steel yoke 2 and an aluminum alloy tube 1, a steel yoke 2 and FRP (fiber reinforced plastic) are used. Tube 1 made of aluminum, or a yoke 2 made of aluminum alloy and a tube 1 made of FRP. Of course, both the tube 1 and the yoke 2 may be made of the same material such as aluminum alloy material or steel material.

On the outer peripheral surface of the shaft portion 2A of the yoke 2, annular grooves (recesses) 4A and 4B located on the left and right in FIG. 1 are provided, and an adhesive layer is provided between the left and right grooves 4A and 4B. 3 is a formation region. Therefore, the left and right grooves 4A and 4B face the left and right peripheral portions 3A and 3B of the adhesive layer 3.

Therefore, in the propeller shaft having such a configuration, when the tube 1 and the yoke 2 are assembled, the adhesive applied in the formation region of the adhesive layer 3 is applied to the end 1A of the tube 1 and the yoke 2. Spreads thinly in a small gap between the shaft portion 2A and the shaft portion 2A, and is cured to form a thin adhesive layer 3. Therefore, the thin adhesive layer 3 firmly adheres the tube 1 and the yoke 2 by the strong interfacial adhesive force.

Further, when the adhesive spreads thinly, the adhesive that tries to spread beyond the grooves 4A and 4B will enter and be retained in the grooves 4A and 4B. Therefore, the adhesive does not leak to the outside beyond the grooves 4A and 4B. For example, when the tube 1 and the yoke 2 are assembled, even if they are aligned by aligning their axes in the vertical direction. The leakage of the adhesive will be prevented. Eventually, at the time of bonding, it spreads only in the limited region between the grooves 4A and 4B to form the thin adhesive layer 3 having a desired width. The widths and depths of the grooves 4A and 4B are optimally set according to the viscosity and the curing time of the adhesive so that the grooves 4A and 4B can surely hold the adhesive.

2 and 3 are views for explaining a second embodiment of the present invention.

In the case of the present embodiment, as shown in FIG. 2, the bottom surface of the groove 4A and the inner surface of the hollow portion 2B of the yoke 2 are located at the portion of the yoke 2 facing the groove 4A on the left side in FIG. An air vent hole 5 penetrating therethrough is provided. At least one air vent hole 5 extends substantially along the radial direction of the yoke 2 and is provided along the circumferential direction of the groove 4A, and its outer end (in FIGS. 2 and 3). (The upper end portion of) is open to the bottom surface of the groove 4A on the left side in FIGS. 2 and 3.

However, such an air vent hole 5 allows the air trapped in the tube 1 to escape to the outside at the time of fitting and assembling the tube 1 and the yoke 2, thereby avoiding an increase in the atmospheric pressure in the tube 1. To do. That is, since both ends of the tube 1 are closed by the yokes 2 attached to both ends of the tube 1, the inner pressure of the tube 1 is increased with respect to the tube 1 from the direction of arrow A in FIG. And gradually try to rise. However, the internal pressure is released to the outside through the hollow portion 2B of the yoke 2 and the air vent hole 5 as shown by an arrow B in FIG. Therefore, the rise of the internal pressure of the tube 1 is avoided, and the tube 1 and the yoke 2 are smoothly and fully fitted and assembled. Further, since the outer end of the air vent hole 5 is open to the bottom surface of the groove 4A on the left side in FIGS. 2 and 3, the fitting assembly of the tube 1 and the yoke 2 as shown in FIG. Until the end of attachment, the air vent hole 5 allows the internal pressure of the tube 1 to escape to the outside, so that the increase of the internal pressure is surely avoided. Further, at the end of the fitting and assembling of the tube 1 and the yoke 2, as shown in FIG. 2, the adhesive agent retained in the groove 4A closes the air vent hole 5 and hardens it to close the air vent hole 5. It will be. Therefore, entry of foreign matter into the tube 1 through the air vent hole 5 is prevented, and special work for filling the air vent hole 5 is unnecessary.

Incidentally, in the prior art, a center hole is provided in the center of the yoke 2 so as to penetrate between the inside of the hollow portion 2B and the outside, and the inside of the tube 1 is substantially opened through the center hole. This prevents an increase in the internal pressure of the tube 1 during the fitting and assembling of the tube 1 and the yoke 2. However, when such a center hole is provided, a special hole filling operation for closing the center hole is required after the fitting and assembling of the tube 1 and the yoke 2 is completed. A hole filling agent such as an adhesive different from the adhesive between the tube 1 and the yoke 2 must be injected into the hole. Therefore, the work for assembling the tube 1 and the yoke 2 is increased due to the need for the hole filling work, and the assembling workability thereof is deteriorated. If the hole filling work is omitted, the quality of the propeller shaft itself may be impaired.

The shapes of the grooves 4A and 4B are arbitrary, and only one of them may be provided or the tube 1 may be provided. In short, at least one of the end portion 1A of the tube 1 and the shaft portion 2A of the yoke 2 may be provided with a concave portion facing the peripheral edge portions 3A and / or 3B of the adhesive layer 3 and capable of holding the adhesive. ..

The size, shape and number of the air vent holes 5 are arbitrary, and it is sufficient that the internal pressure of the tube 1 can be released to the outside when the tube 1 and the yoke 2 are fitted and assembled. When the air vent hole 5 is provided, the groove 4A on the left side may be provided on the tube 1 side, and when the tube 1 and the yoke 2 are fitted and assembled, the outer end portion of the air vent hole 5 is provided. The upper end (in FIG. 2 and FIG. 3) may be opened in the groove 4A.

Further, as shown by a chain double-dashed line in FIG. 3, an air vent hole 6 may be provided on the tube 1 side so as to penetrate between the inside and the outside thereof. In this case, the tube 1 and the yoke 2 are provided. When and are fitted and assembled, the inner end portion (the lower end portion in FIG. 3) of the air vent hole 6 may be opened in the groove 4B on the right side. When the air vent hole 6 is provided, the air in the tube 1 escapes to the outside through the air vent hole 6 until the end of the fitting and assembly of the tube 1 and the yoke 2, and then the tube 1 and the yoke 2 are closed. At the end of the fitting and assembling, the air vent hole 6 will be closed by the adhesive agent retained in the groove 4B on the right side. Therefore, the air vent hole 6 functions similarly to the air vent hole 5 described above. Of course, the size, shape and number of the air vent holes 6 are arbitrary, and it is sufficient that the internal pressure of the tube 1 can be released to the outside when the tube 1 and the yoke 2 are fitted and assembled. When the air vent hole 6 is provided, the groove 4B on the right side may be provided on the tube 1 side, and the inner end portion of the air vent hole 6 when the tube 1 and the yoke 2 are fitted and assembled together. (The lower end in FIG. 3) may be opened in the groove 4B.

Further, in order to allow the internal pressure of the tube 1 to sufficiently escape to the outside just before the end of the fitting and assembling of the tube 1 and the yoke 2, the air vent hole 5 on the side of the yoke 2 is as much as possible in FIGS. 2 and 3. It is preferable that the air vent hole 6 on the left side of the tube 1 and the air vent hole 6 on the side of the tube 1 be provided on the right side of FIG. 3 as much as possible. Even in that case, it goes without saying that the air vent holes 5 and 6 are provided so as to open inside the left and right grooves 4A and 4B, respectively.

After all, at least one of the end portion 1A of the tube 1 and the shaft portion 2A of the yoke 2 is provided with a concave portion which can face the peripheral edge portions 3A and / or 3B of the adhesive layer 3 and can hold the adhesive, Further, at least one portion of the tube 1 or the yoke 2 facing the recess may be provided with an air vent hole 5 or 6 penetrating the portion inward and outward.

[0026]

[Effect of the device]

 As described above, the propeller shaft of the present invention is provided with a concave portion on at least one of the fitting surfaces of the yoke and the tube that faces the peripheral edge of the adhesive layer of the adhesive and can hold the adhesive. With this configuration, when assembling the yoke and the tube, it is possible to spread the adhesive thinly on these fitting surfaces and to limit the spreading area by the recess.

As a result, the adhesive layer can be formed thin to increase the adhesive force between the tube and the yoke, and at the same time, the adhesive before curing can be prevented from leaking to the outside.

In addition, by providing an air vent hole penetrating inward and outward in the portion of the yoke or tube facing the recess, an increase in air pressure in the tube during assembly of the yoke and the tube is avoided. As a result, the assembling workability thereof can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a main part for explaining a state in which the tube and the yoke shown in FIG. 2 are being assembled.

[Explanation of symbols]

 1 Tube 1A End 2 Yoke 2A Shaft 3 Adhesive Layer 3A, 3B Peripheral 4A, 4B Groove 5, 6 Air Vent

Claims (2)

[Scope of utility model registration request] 1. A propeller shaft in which an end portion of a tube is fitted around an outer periphery of a shaft portion of a yoke via an adhesive layer of an adhesive agent, wherein the adhesive is provided on at least one of the bonding surfaces of the yoke and the tube. A propeller shaft, characterized in that it is provided with a recess facing the peripheral edge of the layer so that the adhesive can be retained. 2. The propeller shaft according to claim 1, wherein at least one portion of the yoke or the tube facing the recess is provided with an air vent hole penetrating the portion inward and outward.